beraener



3 Sheets-Sheet 1.

(No Model.)

0. BERGENER.

TRIANGULAR TUBULAR LAMP.

No. 387,038. Patented July 31, 1888.

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3 Sheets-Sheet 2.

0. BERG ENE R.

TRIANGULAR TUBULAR LAMP- (No Model.)

tgnted July 31', 1888.

(No Model.) 3 SheetsSheet 3.

GJBERGENER.

TRIANGULAR TUBULAR LAMP.

No. 387,038. Patented July 81, 1888.

UNITED STATES PATENT GEEICE.

CHARLES BERGENER, OF ROCHESTER, NEW YORK, ASSIGNOR TO THE C. T. HAMMANUFACTURING COMPANY, OF SAME PLACE.

TRIANGULAR TUBULAR LAMP.

SPECIFICATION forming part of Letters Patent No. 387,038, dated July 31,1888.

Application filed January 6, 1887. Serial No. 223.507. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES BERGENER, a citizen of the United States,residing at Rochester, in the county of Monroe and State of New York,have invented an Improved Triangular Tubular Lamp, of which thefollowing is a specification, reference being had to the accompanyingdrawings.

My invention has for its object the application of the tubular principleto triangular lamps, a result which, so far as I am informed, has neverbeen successfully realized in practice.

My improved triangular tubular lamp is I5 fully described andillustrated in the following specification and accompanying drawings,and the novel features thereof specified in the claims annexed to thesaid specification.

In the accompanying drawings, representing my improved triangulartubular lamp, Figure 1 is a plan view. Fig. 2 is a front elevation. Fig.3 is a sideview. Fig. 4c is a central vertical section on the line 4 4,Fig. 2. Fig. 5 is a cross-section on the line 5 5, Figs. 2 and 4.

2 Fig. 6 is a vertical section on the line 6 6 Figs. 3, at, and 5.

My improved triangular lamp is illustrated in the accompanying drawings,in which Ais the back, B B are the glazed doors hinged 3o thereto, and Ois the top section which is surmounted by the dome D.

E is the oil-reservoir, provided with a suitable burner, and resting ona tray, F, secured to the bottom inside the lantern. Suitable catches, aa, hold the oil-reservoir upon the tray F.

The glazed doors B B are arranged at a suitable angle with the back, soas to give the lamp the desired triangular form, and, as indicatedin thedrawings, the oil-reservoir is preferably also made of a similar form.On top the reservoir is formed an air-space, b, which communicates withthe air tube or chamber 0, extending from front to back he- 5 low thelantern-case, by means of the tubes (1 (Z rising from the air-tube c,and extending into the corresponding tubes 6 0, formed in the reservoir,as shown in Fig. 4. These tubes 6 e, forming communicationbetweenthctuhes c d and the air space I), also serve to hold the oil-reservoirfrom lateral movement.

Outside the lantern-case, at the front and back, are the twoairsupplytubes ff, which rise from the horizontal tube '0, and arecurved inward over the top of thelantern to the dome D, where theyconnect with an annular airspace, formed outside the dome, andcommunicating therewith by openings h h placed opposite the mouths ofthe tubesff. The wall of the dome D is continued downward into thelantern-ease or the top section, 0, as shown at D in Figs. 4. and 6. Theadvantage of thus continuing the globe downward within the casing isthat it directs the heated products to the top of the dome moredirectly, and by coming nearer the flame prevents flickering of thelatter by providing dead air chambers at the sides, and does not subjectthe top of the lantern to as intense a heat as would be the ease with alamp with a lower top, and further facilitates the draft or circulationthrough the side tubes. The employ ment of this downward extension is anad junct to lamps in which no chimney or globe is used, thatgreatlyimproves their operation.

The annular air-space 9 outside the dome is open all around at its loweredge, so as to permit fresh air to enter freely at any point around thecircumference. The annular space 9 is closed at its upper edge. The topof the dome D is provided with the cap or cover z, below which and abovethe deflector j is left an open space through which the products ofcombustion escape.

My improved triangular tubular lamp may be provided with a bail, I, forconvenience of transportation, and with suitable hinged rings or loops,it, by which it may be hung up against a wall or other suitable support.The bottom of the lamp may also be provided with suitable lugs or feet.The glazed doors or sides B B are hinged to the back at Z Z, andprovided at their forward edges with suitable hooks or catches, m m, bywhich they are fastened shut. The burner is provided with the usualstar-wheel, o, for raising or lowering the wick, the stem of whichstar-wheel is extended outward in front of the lamp, as indicated at n,Figs. 3 and 5, so as to permit the adjustment of the wick withoutopening either of the doors. At its outer end the stem 1:. has the smallthumb-wheel 0 attached thereto. The stem it passes through an orifice ornotch, 19, Fig. 3, in the edge of the upright post g at the front of thelamp, so as to permit the frame of the glazed door B to shut against thepost. The top section, 0, is made triangular in shape to correspond withthe body of the lamp, its sides being preferably inclined inward, asrepresented in the drawings. The air-tubes ff are stayed to the topsection, as shown at a" r, Fig. 3.

A suitable reflector, G, may be placed inside the lamp, attached to theback.

From the air-space b above the reservoir the air rises upward within theburner'cone to obtain access to the flame. The tubes d and e serve topermit the removal of the oil-reservoir from the lamp, and also supplyair to the burner from the lower tube, 0, in the most direct manner. 1

s, Fig. 6, is a perforated plate introduced inside the burner'cone toequalize and control the air-current.

t is a filler, and u a ring, attached to the oilreservoir. The tray Fserves to separate the bottom of the oil-reservoir from the base-plate Jof the lamp, thus preventing the chilling of the oil in cold weather.

The course of the air-currents in my improved lantern is indicated bythe arrows on the various figures. When the lamp is burning in stillair, the heated air passes into the dome D, and a portion of it, mixedwith fresh air received through the annular air-space 9, passes into thetubes ff, as indicated by the arrows on the left-hand side of Fig. 4,and thence is fed to the burner through the pipes c d d. When exposed tothe wind or currents of air, a somewhat different action takes place inthat the fresh air from the air-space 9 passes in part into theair-supply tubesff, While a portion of it enters through theperforations h h into the dome, and is discharged at the top thereof, asindicated by the arrows on the right-hand side of Fig. 4, little or noneof the air passing into the supply-tubes. In this way the upward currentinside the lamp isbalanced against the downward current in theair-supply tubes, and, consequently, the flame, receiving a current ofair at a uniform pressure, burns steadily and without flickering.

My improved triangular lamp will burn steadily and without flickering inthe most exposed positions, and when subjected to violent blasts orcurrents of air. Its capacity in this respect renders it eminentlyadapted to outdoor uses-such as lighting railway sta- 6o tions orplatforms, docks, freight-houses, and similar localities. It may also beused for lighting steamers or sailing-vessels.

The improved construction of the dome and annular airspace hereindescribed may also 6 be employed in other forms of tubular lamps.

It will be noted that by placing an annular chamber entirely around thedome and open only at the bottom drafts of air from any direction', thatwould tend to extinguish the lamp, 0

will, if they operate on the open top of the dome at all, operate on thedownward draft as well.

I claim 1. In a tubular lantern, the combination, 7

with a suitable burner, oil-reservoir, and airchamber, of a dome havingperforations open to the air, the airspace surrounding the said domeclosed at the top and open to the air at the bottom, and having openingsinto the dome, 8c-

and the air-tubes communicating at the base with the air-chamber andpassing upward and communicating with the air-space at the dome,substantially as described.

2. The combination, in a lantern, with the casing thereof, of a topsection having a dome which has perforations open to the air and extendsdownward within the casing, the airspace around the dome communicatingtherewith and open to the air at the bottom, the

burner, the air-chamber, and the air-tubes communicating with theannular air-space and the chamber at the burner, substantially asdescribed.

3. The combination, in a lantern. with the 5 casing, of the perforateddome D, having openings h h and extending downward within the casing,the annular air-space g, surrounding the dome and open at the bottomonly, the

burner and the air-chamber and the air-tubes I00 f f communicating withthe air-space at the openings h and with the air-chamber at the burner,substantially as described.

4. The combination, in a lantern, of the top section having theperforated dome, the openings h h, the annular air-space surrounding thesame, closed atthe top and open at the bottom, the burner andair-chamber of the air-tubes communicating with the chamber at theburner and with the air-space opposite the 1 1o openings h h,substantially as described.

CHARLES BERGENER.

Witnesses:

.GEo. B. SELDEN,

O. T. HAM.

